| // Copyright 2011 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| |
| // This file relies on the fact that the following declaration has been made |
| // in runtime.js: |
| // const $Object = global.Object; |
| const $WeakMap = global.WeakMap; |
| |
| // ------------------------------------------------------------------- |
| |
| function WeakMapConstructor() { |
| if (%_IsConstructCall()) { |
| %WeakMapInitialize(this); |
| } else { |
| return new $WeakMap(); |
| } |
| } |
| |
| |
| function WeakMapGet(key) { |
| if (!IS_SPEC_OBJECT(key)) { |
| throw %MakeTypeError('invalid_weakmap_key', [this, key]); |
| } |
| return %WeakMapGet(this, key); |
| } |
| |
| |
| function WeakMapSet(key, value) { |
| if (!IS_SPEC_OBJECT(key)) { |
| throw %MakeTypeError('invalid_weakmap_key', [this, key]); |
| } |
| return %WeakMapSet(this, key, value); |
| } |
| |
| |
| function WeakMapHas(key) { |
| if (!IS_SPEC_OBJECT(key)) { |
| throw %MakeTypeError('invalid_weakmap_key', [this, key]); |
| } |
| return !IS_UNDEFINED(%WeakMapGet(this, key)); |
| } |
| |
| |
| function WeakMapDelete(key) { |
| if (!IS_SPEC_OBJECT(key)) { |
| throw %MakeTypeError('invalid_weakmap_key', [this, key]); |
| } |
| if (!IS_UNDEFINED(%WeakMapGet(this, key))) { |
| %WeakMapSet(this, key, void 0); |
| return true; |
| } else { |
| return false; |
| } |
| } |
| |
| // ------------------------------------------------------------------- |
| |
| function SetupWeakMap() { |
| // Set up the WeakMap constructor function. |
| %SetCode($WeakMap, WeakMapConstructor); |
| |
| // Set up the WeakMap prototype object. |
| %FunctionSetPrototype($WeakMap, new $WeakMap()); |
| |
| // Set up the constructor property on the WeakMap prototype object. |
| %SetProperty($WeakMap.prototype, "constructor", $WeakMap, DONT_ENUM); |
| |
| // Set up the non-enumerable functions on the WeakMap prototype object. |
| InstallFunctionsOnHiddenPrototype($WeakMap.prototype, DONT_ENUM, $Array( |
| "get", WeakMapGet, |
| "set", WeakMapSet, |
| "has", WeakMapHas, |
| "delete", WeakMapDelete |
| )); |
| } |
| |
| |
| SetupWeakMap(); |